Spectroscopic study of the formation and decay of intermediates for the novel photochemistry of sterically strained [6]-1,4-cyclophaneanthraquinone
作者:Toshihiro Nakayama、Sadao Miki、F.M. Abdel-Latif、Kazuyasu Ibuki、Kumao Hamanoue
DOI:10.1016/0009-2614(94)00173-1
日期:1994.4
photolysis of the title compound (CyAQ) reveals the equilibrium formation of the ground-state singlet biradical (1BR) and its methide (MT, i.e. 4,5-benzo-6-hydroxytricyclo[6,6,2,02,7]hexadeca-1,4,6,8,15-pentaen-3-one) by the intramolecular hydrogen-atom transfer originating from both the lowest excited singlet and triplet states of CyAQ. Combined with the results of a 1H NMR analysis for the photoproducts obtained
纳秒激光对标题化合物(CyAQ)的光解揭示了基态单重双自由基(1 BR)及其甲基化物(MT,即4,5-苯并-6-羟基三环[6,6,2,0 2 ,7 ] hexadeca-1,4,6,8,15-pentaen-3-one)的分子内氢原子转移起源于CyAQ的最低激发单重态和三重态。结合在室温下获得的光产物的1 H NMR分析结果,得出的结论是1 BR(和/或MT)变为9,10-邻苯二甲酰基双环[6,2,2] dodeca-1,9, EPA中的11-三烯和1,4-二氢-1,4-二乙氧基-1,4-己基-9,10-二羟基蒽(乙醚/异戊烷/乙醇= 5:5:2)苯中的前产物。